gistfile1.m

/*
 PerfCheck: Stopwatch for Debugging (ObjC)

 Usage:
    PFBEGIN(@"hoge");
    // some process
    PFEND(@"hoge");

    PFBEGIN(@"fuga");
    // some process
    PFEND(@"fuga");

    PFBEGIN(@"hoge");
    // some process
    PFEND(@"hoge");

 
    // when app quitting (UIApplicationDelegate#applicationWillTerminate) 
    PFDUMP;

    // ->
    // 2010-03-06 07:47:14.386 PerformanceChecker[1851:207] [PerfCheck] hoge in total 8.7ms
    // 2010-03-06 07:47:14.401 PerformanceChecker[1851:207] [PerfCheck] fuga in total 9.0ms
*/

////////////// PerfCheck.h

#import <Foundation/Foundation.h>

void PerfCheckStopwatchStart(NSString *name);
void PerfCheckStopwatchEnd(NSString *name);
void PerfCheckDump();

#ifdef PERFCHECK_ENABLE
#define PFBEGIN(x)		PerfCheckStopwatchStart(x)
#define PFEND(x)		PerfCheckStopwatchEnd(x)
#define PFDUMP			PerfCheckDump()
#else
#define PFBEGIN(x)		(0)
#define PFEND(x)		(0)
#define PFDUMP			(0)
#endif


////////////// PerfCheck.m

#import "PerfCheck.h"

static NSMutableDictionary *totalDict = nil;
static NSMutableDictionary *runningDict = nil;

void PerfCheckStopwatchStart(NSString *name) {
	if (runningDict == nil) {
		runningDict = [[NSMutableDictionary alloc] init];
	}
	[runningDict setObject:[NSNumber numberWithDouble:CFAbsoluteTimeGetCurrent()]
					forKey:name];
}

void PerfCheckStopwatchEnd(NSString *name) {
	double now = CFAbsoluteTimeGetCurrent();
	double before = [[runningDict valueForKey:name] doubleValue];
	if (totalDict == nil) {
		totalDict = [[NSMutableDictionary alloc] init];
	}
	double total = [[totalDict valueForKey:name] doubleValue];
	total += now - before;
	[totalDict setObject:[NSNumber numberWithDouble:total]
				  forKey:name];
}

void PerfCheckDump() {
	NSArray *keys = [[totalDict allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
	for (NSString *k in keys) {
		NSLog(@"[PerfCheck] %@ in total %.1fms", 
			  k, [[totalDict valueForKey:k] doubleValue] * 1000.0);
	}
	
	[runningDict release];
	runningDict = nil;
	[totalDict release];
	totalDict = nil;
}